RWC and cloud coverage shape
Quoting the manual:
"The clouds shown don’t match perfectly with X-Plane’s weather radar.
Our clouds are positioned very precisely, often even more precisely than X-Plane’s own default clouds. As a result, X-Plane’s built-in weather radar display will show the same general shape of weather patterns that RWC displays, but the correlation won’t be perfect."
See the screenshots. Every time I encounter an overcast, the edge consists of perfect lines. Like it was composed from perfect squ
Sundog Software is very experienced in this domain. They sell an entire array of Weather SDK's.
It may sound trivial to just AA a bitmap, but think about it, to have any real effect at reducing the saw tooth the cell data tracking is going to go up by a factor of at least four.
If not all you're going to do is end up with blurred data from nearest neighbour cells which gives you the exact same saw tooth cell resolution with weaker weather conditions in each grid position at the fringe.